Change Max's affiliation to Argonne (#254)

* change max's affiliation to argonne

* Update index.md

Author: jukent

portal/index.md

@@ -324,7 +324,7 @@ are open to anyone who wishes to participate. We publish
 
 **Max Grover**
 <br/>
-[**NCAR**](https://ncar.ucar.edu)
+[**Argonne National Laboratory**](https://www.anl.gov/)
 <br/>
 [@mgrover1](https://github.com/mgrover1)